The size of the land in the Korean server was much smaller than the Japanese server.
The three islands and six cities of the Japanese server were already smaller than a small portion of the Chinese server. The Korean server was only a peninsula with three main cities.
They were Starry Sky City, City of Sky and Heavenly God City.
Starry Sky City was the biggest main city among the three main cities in the Korean server. City of Sky and Heavenly God City might sound impressive but they were far from being comparable to Starry Sky City.
This was because in the background story of <<REBIRTH>>, Starry Sky City was where the God of Light died and it was also labelled as a Holy Domain. The NPC and even players of the Korean server even deemed themselves to be people of God. They had firm beliefs that the Starry Sky City was the centre of the entire game and that this piece of territory in the Korean server was the origin of life in the entire <<REBIRTH>>.